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[public-dns-discuss] Google Public DNS resolving incorrect IP addresses



Hi,
for some unknown reasons Google Public DNS started to resolve the incorrect IP address for our domain:

$ dig breathelife.com @8.8.8.8

; <<>> DiG 9.10.6 <<>> breathelife.com @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35001
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;breathelife.com. IN A

;; ANSWER SECTION:
breathelife.com. 3525 IN A 216.239.32.21
breathelife.com. 3525 IN A 216.239.34.21
breathelife.com. 3525 IN A 216.239.36.21
breathelife.com. 3525 IN A 216.239.38.21

;; Query time: 3 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Thu Oct 31 11:16:47 EDT 2019
;; MSG SIZE  rcvd: 108

The IPs 216.239.X.21 are not our servers and we didn't make any change in our DNS for about 3-4 months.

I had to flush the Public DNS cache for this domain at https://developers.google.com/speed/public-dns/cache, but for a few hours our website and emails (MX records were also not resolving anymore) were not working because of this.

Any clue what could have happened?
Thanks

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